The value of Planck's constant is 6.63 × 10 − 34 js. The velocity of light is 3.0 × 10 8 m s − 1 . Which value is closest to the wavelength in nanometers of a quantum of light with frequencty of 8 × 10 15 s − 1 1) 3 × 10 7 2) 2 × 10 − 25 3) 5 × 10 − 8 4) 4 × 10 1

Question

The value of Planck&#039;s constant is   6.63  ×      10          −      34       js. The velocity of light is   3.0  ×      10    8    m      s          −      1      . Which value is closest to the wavelength in nanometers of a quantum of light with frequencty of   8  ×      10          15            s          −      1       1)   3  ×      10          7      2)   2  ×      10          −      25      3)   5  ×      10          −      8      4)   4  ×      10    1

Larry Newman · Accepted Answer

The correct answer is 4)   4  ×      10    1    λ  =      c    v    =            3      ×              10        8                    8      ×              10                  15                      =  3.75  ×      10          −      8        =  3.75  ×      10          −      8        ×      10    9    n  m  =  4  ×      10    1    n  m

The value of Planck's constant is 6.63×10^{-34}js.

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